A light-duty excavator lower frame turnover device

Abstract

This utility model discloses a lightweight excavator undercarriage tilting device, including a base frame, a moving frame, a travel drive, a counterweight, a lifting frame assembly, a rotating component, and a lifting drive. The base frame is fixed to the ground by screws around its perimeter. First linear guide rails are fixedly installed at both ends of the top of the base frame, and the moving frame is slidably mounted on the surface of the first linear guide rails. The travel drive for horizontal movement of the moving frame is installed at both ends of the top of the base frame. A lifting drive for height adjustment of the lifting frame assembly is installed on the top of the moving frame. The lifting frame assembly is mounted on the outer side of the moving frame. This utility model replaces the hydraulic system with a fully electric drive (travel / lifting / clamping three-motor reducer), and, in conjunction with a precision transmission structure of gear rack, T-type screw nut, and second linear guide rail, completely solves the three major technical problems of traditional tilting equipment: oil leakage and pollution, excessive noise (<65dB), and low positioning accuracy (±0.5mm).

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a light-load excavator undercarriage tilting device. Background Technology

[0002] Excavators are earthmoving machines widely used in engineering construction. During the offboard assembly process, the underframe needs to be rotated twice.

[0003] Most existing tipping equipment is hydraulically driven, which suffers from unresolved problems such as oil leakage, environmental pollution, and high noise levels. To meet workers' demands for a comfortable working environment, tipping equipment must be low-noise and pollution-free. Utility Model Content

[0004] The purpose of this utility model is to provide a lightweight excavator undercarriage tilting device. This utility model replaces the hydraulic system with a fully electric drive (travel / lifting / clamping three-motor reducer), and with a precision transmission structure of gear rack, T-type screw nut and second linear guide rail, it completely solves the three major technical problems of traditional tilting equipment: oil leakage and pollution, excessive noise (<65dB), and low positioning accuracy (±0.5mm); thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A light-duty excavator undercarriage tilting device includes a base frame, a moving frame, a travel drive, a counterweight, a lifting frame assembly, a rotating component, and a lifting drive.

[0007] The bottom frame is fixed to the ground by screws around its perimeter. The top two ends of the bottom frame are fixedly installed with first linear guide rails, and a movable frame is slidably installed on the surface of the first linear guide rails.

[0008] The bottom frame has a walking drive installed at both ends of the top for horizontal movement of the moving frame; the top of the moving frame has a lifting drive for height adjustment of the lifting frame assembly; the lifting frame assembly is installed on the outside of the moving frame.

[0009] The lifting frame assembly has a rotating component installed on its front side to facilitate rotation and flipping.

[0010] Preferably, the walking drive includes a first motor reducer, a gear and a rack, the output end of the first motor reducer is meshed with a gear, the surface of the gear is meshed with a rack, and the rack is fixedly installed on the bottom frame;

[0011] The combination of the motor reducer, gears, and rack enables the horizontal movement of the moving frame.

[0012] Preferably, a counterweight is fixed to the upper back of the movable frame by external screws.

[0013] Preferably, the lifting drive includes a second motor reducer and a sprocket seat. The second motor reducer is fixedly installed at one end of the top of the movable frame, and the output end of the second motor reducer is connected to the sprocket seat. The sprocket seat is provided with a chain for the lifting frame assembly to rise and fall.

[0014] Preferably, the lifting frame assembly includes a lifting frame, a connector, and rollers. The lifting frame has rollers installed around its inner perimeter, and the surfaces of the rollers slide against the outer side of the moving frame. The connector is fixedly installed on the upper front of the lifting frame and is fixedly connected to a chain.

[0015] Preferably, the rotating component includes a rotating frame, a clamping drive, a clamping linkage, and a second linear guide. One end of the rotating frame is fixedly connected to a slewing bearing, which is rotatably mounted on the front of the lifting frame. A slewing drive, including a slewing motor, is located below the inner side of the slewing bearing and is meshed with the slewing bearing. The clamping drive includes a T-screw, a T-nut, a support base, a fixed support, a coupling, and a third motor reducer. The output end of the third motor reducer is connected to a... The coupling has a T-shaped lead screw fixedly connected to one end, a T-shaped nut installed at one end of the T-shaped lead screw, and a support base fixedly installed at one end of the T-shaped nut. The rotating frame is connected to the clamping drive via the support base and is linked to the clamping rod via the second linear guide rail and the rotating shaft. The second linear guide rail is fixed to both sides of the rotating frame. The third motor reducer is fixed on the lifting frame assembly and drives the clamping rod to complete the opening and closing clamping action via the T-shaped nut. The T-shaped nut and the clamping rod are rigidly connected via an external threaded pair.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model replaces the hydraulic system with a fully electric drive (three-motor reducer for walking / lifting / clamping), and, in conjunction with a precision transmission structure consisting of gear rack, T-type lead screw nut, and second linear guide rail, completely solves the three major technical problems of traditional tilting equipment: oil leakage and pollution, excessive noise (<65dB), and low positioning accuracy (±0.5mm). Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the isometric structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the left-side structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 4 This is a top view of the structure of this utility model;

[0022] Figure 5 This is a front view structural diagram of the lifting frame assembly;

[0023] Figure 6 for Figure 5 Schematic diagram of the AA structure;

[0024] Figure 7 This is a schematic diagram of the left-side structure of the rotating component;

[0025] Figure 8 for Figure 7 Schematic diagram of the BB structure;

[0026] Figure 9 This is a schematic diagram of the clamping drive structure.

[0027] In the diagram: 1. Base frame; 2. Moving frame; 3. Travel drive; 301. First motor reducer; 302. Gear; 303. Rack; 4. Counterweight; 5. Lifting frame assembly; 6. Rotating component; 7. First linear guide rail; 8. Lifting drive; 801. Second motor reducer; 802. Sprocket seat; 9. Rotation drive; 10. Lifting frame; 11. Slewing bearing; 12. Roller; 13. Rotating frame; 14. Clamping drive; 15. Clamping connecting rod; 16. Second linear guide rail; 17. Rotating shaft; 18. T-screw; 19. T-nut; 20. Support seat; 21. Fixed support; 22. Coupling; 23. Third motor reducer. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-9 This utility model provides a technical solution:

[0030] A lightweight excavator undercarriage tilting device includes a base frame 1, a moving frame 2, a travel drive 3, a counterweight 4, a lifting frame assembly 5, a rotating component 6, and a lifting drive 8.

[0031] The base frame 1 is fixed to the ground by screws around its perimeter. The top two ends of the base frame 1 are fixedly installed with first linear guide rails 7, and a movable frame 2 is slidably installed on the surface of the first linear guide rails 7. A baffle is installed on the lower side of one side of the movable frame 2 to facilitate safety protection.

[0032] Among them, the top two ends of the bottom frame 1 are equipped with a walking drive 3 for moving the frame 2 horizontally; the walking drive 3 includes a first motor reducer 301, a gear 302 and a rack 303. The output end of the first motor reducer 301 is meshed with the gear 302, the surface of the gear 302 is meshed with the rack 303, and the rack 303 is fixedly installed on the bottom frame 1.

[0033] The cooperation of the first motor reducer 301, gear 302 and rack 303 enables the horizontal movement of the moving frame 2.

[0034] By starting the first motor reducer 301, its output end drives the gear 302 to rotate, so as to drive the moving frame 2 to move forward and backward on the first linear guide rail 7.

[0035] The top of the mobile frame 2 is equipped with a lifting drive 8 for adjusting the height of the lifting frame assembly 5; the lifting drive 8 includes a second motor reducer 801 and a sprocket seat 802. The second motor reducer 801 is fixedly installed at one end of the top of the mobile frame 2, and the output end of the second motor reducer 801 is connected to the sprocket seat 802. The sprocket seat 802 is provided with a chain for the lifting frame assembly 5 to rise and fall.

[0036] By starting the second motor reducer 801, its output end drives the sprocket built into the sprocket seat 802 to rotate, so that the sprocket drives the chain wound on it to move up and down along the front of the moving frame 2. At the same time, one end of the chain drives the lifting frame 10 to move up and down for adjustment.

[0037] The lifting frame assembly 5 is installed on the outside of the movable frame 2. The lifting frame assembly 5 includes a lifting frame 10, a connector and rollers 12. Rollers 12 are installed around the inside of the lifting frame 10. The surface of the rollers 12 slides against the outside of the movable frame 2. A connector is fixedly installed on the top front of the lifting frame 10 and is fixedly connected to the chain.

[0038] While the lifting frame assembly 5 moves up and down, it slides at a constant speed on the moving frame 2 via the inner rollers 12, so as to improve the stability of the lifting frame 10 when it moves.

[0039] The lifting frame assembly 5 has a rotating component 6 installed on its front side for easy rotation and flipping. The rotating component 6 includes a rotating frame 13, a clamping drive 14, a clamping connecting rod 15, and a second linear guide rail 16. One end of the rotating frame 13 is fixedly connected to a slewing bearing 11, which is rotatably mounted on the front side of the lifting frame 10. A slewing drive 9 is provided on the lower inner side of the slewing bearing 11. The slewing drive 9 includes a slewing motor, and the slewing motor is meshed and driven by the slewing bearing 11.

[0040] This utility model achieves a flipping effect by starting a rotary motor, causing its output end to drive the rotary bearing 11 to rotate, which in turn causes the rotary bearing 11 to drive the rotating frame 13 mounted on it to rotate.

[0041] The clamping drive 14 includes a T-shaped lead screw 18, a T-shaped nut 19, a support base 20, a fixed support 21, a coupling 22, and a third motor reducer 23. The output end of the third motor reducer 23 is connected to the coupling 22. One end of the coupling 22 is fixedly connected to the T-shaped lead screw 18. One end of the T-shaped lead screw 18 is equipped with a T-shaped nut 19. One end of the T-shaped nut 19 is fixedly installed with the support base 20.

[0042] The rotating frame 13 is connected to the clamping drive 14 via the support base 20 and the clamping rod 15 via the second linear guide 16 and the rotating shaft 17. The second linear guide 16 is fixed on both sides of the rotating frame 13. The third motor reducer 23 is fixed on the lifting frame assembly 5 and drives the clamping rod 15 to complete the opening and closing clamping action via the T-nut 19. The T-nut 19 and the clamping rod 15 are rigidly connected by an external thread pair.

[0043] This utility model starts the third motor reducer 23, which drives the T-shaped lead screw 18 to rotate at its output end. The T-shaped lead screw 18 then drives the clamping connecting rod 15 to perform clamping and opening movements, thereby realizing the clamping and releasing action of the workpiece.

[0044] A counterweight 4 is fixed to the upper back of the movable frame 2 by external screws. This facilitates the weighting of the movable frame 2, providing counterweight to the lifting frame 10 and preventing it from tilting.

[0045] This utility model replaces the hydraulic system with a fully electric drive (a three-motor reducer for walking, lifting, and clamping), and, in conjunction with a precision transmission structure consisting of gears 302 and racks 303, a T-type lead screw 18, a nut, and a second linear guide rail 16, completely solves the three major technical problems of traditional tilting equipment: oil leakage and pollution, excessive noise (<65dB), and low positioning accuracy (±0.5mm). Simultaneously, it achieves three major technical effects:

[0046] (1) Eliminate hydraulic oil contamination, enclose transmission components for lubrication, and pass ISO 14001 environmental certification;

[0047] (2) Overall noise is reduced by 40% to within OSHA safety standards, and vibration amplitude is reduced by 60%;

[0048] (3) Electromechanical coordinated control improves response speed by 40%, reduces energy consumption by 35%, extends maintenance cycle to 8,000 hours, and improves overall efficiency by 50%.

[0049] This utility model achieves positioning control of the equipment through an external pull-rope encoder. The entire device operates smoothly, with precise positioning and rapid stopping. Multiple safety protection measures are employed, ensuring reliable safety performance.

[0050] The first motor reducer 301, the second motor reducer 801 and the third motor reducer 23 use SEWEurodrive's R series helical gear reducer motor (model R37DT90L4, power 1.5kW, output torque 120N·m);

[0051] The rotary drive 9 uses Nord's IE5 ultra-high efficiency servo motor (model MSK050C-0300, rated speed 3000rpm, equipped with a built-in 20-bit absolute encoder).

[0052] Coupling 22 adopts the R+W SK series high elasticity coupling (model SK3-50, rated torque 50 N·m, compensating for radial deviation ±0.5 mm).

[0053] In practical use, after receiving the workpiece arrival signal, the walking drive 3 drives the moving frame 2 to move forward to the position, the lifting drive 8 drives the lifting frame assembly 5 to descend to the position, and then the clamping link 15 clamps the workpiece under the drive of the clamping drive 14. The lifting frame assembly 5 drives the workpiece to rise to the highest position under the drive of the lifting drive 8. The rotating part 6 drives the workpiece to rotate 180° under the drive of the rotation drive 9. Then the lifting frame assembly 5 drives the workpiece to descend to the position under the drive of the lifting drive 8. The clamping link 15 opens under the drive of the clamping drive 14, the walking drive 3 drives the moving frame 2 to retreat to the position, and the workpiece leaves.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A light-duty excavator undercarriage tilting device, comprising a base frame (1), a moving frame (2), a travel drive (3), a counterweight (4), a lifting frame assembly (5), a rotating component (6), and a lifting drive (8), characterized in that: The bottom frame (1) is fixed to the ground by screws around its perimeter. The top two ends of the bottom frame (1) are fixedly installed with first linear guide rails (7), and a movable frame (2) is slidably installed on the surface of the first linear guide rails (7). Among them, the top two ends of the bottom frame (1) are equipped with a walking drive (3) for horizontal movement of the moving frame (2); the top of the moving frame (2) is equipped with a lifting drive (8) for height adjustment of the lifting frame assembly (5); the lifting frame assembly (5) is installed on the outside of the moving frame (2). The lifting frame assembly (5) has a rotating component (6) installed on its front side to facilitate rotation and flipping.

2. The undercarriage tilting device for a light-duty excavator according to claim 1, characterized in that: The walking drive (3) includes a first motor reducer (301), a gear (302) and a rack (303). The output end of the first motor reducer (301) is meshed with the gear (302), and the surface of the gear (302) is meshed with the rack (303). The rack (303) is fixedly installed on the bottom frame (1). The cooperation of the first motor reducer (301), gear (302) and rack (303) enables the horizontal movement of the moving frame (2).

3. The undercarriage tilting device for a light-duty excavator according to claim 1, characterized in that: A counterweight (4) is fixed to the upper back of the movable frame (2) by external screws.

4. The undercarriage tilting device for a light-duty excavator according to claim 1, characterized in that: The lifting drive (8) includes a second motor reducer (801) and a sprocket seat (802). The second motor reducer (801) is fixedly installed on one end of the top of the movable frame (2), and the output end of the second motor reducer (801) is connected to the sprocket seat (802). The sprocket seat (802) is provided with a chain for the lifting frame assembly (5) to rise and fall.

5. The undercarriage tilting device for a light-duty excavator according to claim 1, characterized in that: The lifting frame assembly (5) includes a lifting frame (10), a connector and rollers (12). The lifting frame (10) is equipped with rollers (12) around its interior. The surface of the rollers (12) slides against the outer side of the moving frame (2). A connector is fixedly installed on the top front of the lifting frame (10) and is fixedly connected to the chain.

6. The undercarriage tilting device for a light-duty excavator according to claim 1, characterized in that: The rotating component (6) includes a rotating frame (13), a clamping drive (14), a clamping connecting rod (15), and a second linear guide rail (16). One end of the rotating frame (13) is fixedly connected to a slewing bearing (11), which is rotatably mounted on the front of the lifting frame (10). A slewing drive (9) is provided on the lower inner side of the slewing bearing (11). The slewing drive (9) includes a slewing motor, and the slewing motor is meshed and driven by the slewing bearing (11). The clamping drive (14) includes a T-shaped lead screw (18), a T-shaped nut (19), a support base (20), a fixed support (21), a coupling (22), and a third motor reducer (23). The output end of the third motor reducer (23) is driven by a coupling (25). 2) One end of the coupling (22) is fixedly connected to a T-shaped lead screw (18), one end of the T-shaped lead screw (18) is equipped with a T-shaped nut (19), and one end of the T-shaped nut (19) is fixedly installed with a support seat (20); the rotating frame (13) is connected to the clamping drive (14) by fixing the support seat (21) through the support seat (20), and is linked with the clamping connecting rod (15) through the second linear guide rail (16) and the rotating shaft (17); the second linear guide rail (16) is fixed on both sides of the rotating frame (13); the third motor reducer (23) is fixed on the lifting frame assembly (5), and drives the clamping connecting rod (15) to complete the opening and closing clamping action through the T-shaped nut (19), and the T-shaped nut (19) and the clamping connecting rod (15) are rigidly connected through the external thread pair.

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